In message <FBEDKEIEMDPKGDDCPGNCIEEHDLAA.wa1zms at att.net>, wa1zms at att.net writes
:
>Since I got it working several years ago, my HP-5060A
>has a rather loud ~2KHz audible whine coming from it.
>It seems to be a result of the switching power supply
>in the A20 oven controller module.
My units did the same thing, and I traced the sound to
one of the two high-voltage supplies and decided that
it was probably not worth the trouble...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.